public async Task HostHealthMonitor_RestartsSuccessfully_WhenHostRecovers()
{
Assert.Equal(ScriptHostState.Running, _scriptHostService.State);
// crank this number up so we don't do a shutdown but instead
// continue the retry loop
_healthMonitorOptions.HealthCheckThreshold = 100;
// now that host is running make host unhealthy and wait
// for host shutdown
_exceededCounters.Add("Connections");
_underHighLoad = true;
await TestHelpers.Await(() => _scriptHostService.State == ScriptHostState.Error);
var lastError = _scriptHostService.LastError;
Assert.Equal("Host thresholds exceeded: [Connections]. For more information, see https://aka.ms/functions-thresholds.", _scriptHostService.LastError.Message);
// verify we are in a startup/retry loop
await TestHelpers.Await(() =>
{
var allLogs = _testHost.GetLog();
return(allLogs.Contains("Host initialization: ConsecutiveErrors=3"));
});
Assert.Equal(ScriptHostState.Error, _scriptHostService.State);
_mockJobHostEnvironment.Verify(p => p.Shutdown(), Times.Never);
// after a few retries, put the host back to health and verify
// it starts successfully
_exceededCounters.Clear();
_underHighLoad = false;
await TestHelpers.Await(() => _scriptHostService.State == ScriptHostState.Running);
Assert.Null(_scriptHostService.LastError);
var logMessages = _testHost.GetScriptHostLogMessages();
Assert.Contains(logMessages, p => p.FormattedMessage == "Job host started");
}
public async Task HostStatusReturns_IfHostJsonError()
{
string hostJsonPath = Path.Combine(_hostPath, ScriptConstants.HostMetadataFileName);
// Simulate a non-empty file without a 'version'
JObject hostConfig = JObject.FromObject(new
{
functionTimeout = TimeSpan.FromSeconds(30)
});
await File.WriteAllTextAsync(hostJsonPath, hostConfig.ToString());
string logPath = Path.Combine(Path.GetTempPath(), @"Functions");
_host = new TestFunctionHost(_hostPath, logPath, _ => { });
// Ping the status endpoint to ensure we see the exception
HostStatus status = await _host.GetHostStatusAsync();
Assert.Equal("Error", status.State);
Assert.Equal("Microsoft.Azure.WebJobs.Script: The host.json file is missing the required 'version' property. See https://aka.ms/functions-hostjson for steps to migrate the configuration file.", status.Errors.Single());
// Due to https://github.com/Azure/azure-functions-host/issues/1351, slow this down to ensure
// we have a host running and watching for file changes.
await TestHelpers.Await(() =>
{
return(_host.GetLog().Contains("[Microsoft.Extensions.Hosting.Internal.Host] Hosting started"));
});
// Now update the file and make sure it auto-restarts.
hostConfig["version"] = "2.0";
await File.WriteAllTextAsync(hostJsonPath, hostConfig.ToString());
await TestHelpers.Await(async() =>
{
status = await _host.GetHostStatusAsync();
return(status.State == $"{ScriptHostState.Running}");
}, userMessageCallback : _host.GetLog);
Assert.Null(status.Errors);
}
